Dr. E. P. Wriglit on a neio Species o/'Pennella. 43 



is to be doubted if this species, the animal being unknown, is a 

 gciiumc Zonites. If, indeed, all those species (to which, how- 

 ever, lIcUx dictyodesy Pfr., cannot j)ossibly belong) ranged by 

 Albers in his group of Ilhytida really are the most nearly rchated 

 to in(C(jiialis,Vi\:, which 1 examined, the whole group, nndi-r the 

 name given by Albers, might be removed from the series of the 

 Helices and placed among the Testaeellidai ; however, I would 

 caution against so summary a procedure, although convenient, 

 and would rather encourage Australian and other malacologists 

 not to shun the trouble of examining these animals, as, surely, 

 through anatomical investigation the relations between the dif- 

 ferent groups of Pulmonata will be discovered more easily and 

 sooner than by a continual accumulation of shells only. Cer- 

 tainly a conscientious comparison of shells will gradually 

 lead to natural groups ; but, in spite of immense collections, 

 this conchological method will always be slow and at the same 

 time dangerous, for the material available on this field is too 

 easily monopolized. If, instead of the thousarids of shells that 

 annually are sent home by collecting travellers, only a few 

 hundred species in spirits, allowing a more minute examina- 

 tion, were one day to reach Europe, such an event might well 

 be hailed by malaeozoology. 

 Wiirzburg, December 9, 18G9. 



\ll. — On a new Species of the Genus Pennella. By Edward 

 Perceval Wright, M.D., F.L.S., Professor of Botany in 

 the University of Dublin. 



[Plate I.] 



The memoirs of Steenstrup and Liitken in the ' Transactions 

 of the Danish Academy'*, and of Xordmann in the ' Bulletin 

 of the Moscow Society of Naturalists 't, have added very 

 largely to our knowledge not only of the species of the genus 

 Pennella, but also of the great variation to which several of the 

 species appear liable. The specific characters, however, are 

 for the most part difficult to determine ; this is fully recognized 

 by Professor Claus in his memoir on the Lernicidic |. This 



* " Bidrag' til Kimdskab om dct aabne Havs Snyltekrebs o<^ Lernseer 

 samt om no<rle andre nye eller hidtil kun iifuldstseudigt kjendte parasi- 

 tiske Copepoder," Vidensk. 8elsk. Skr. 5. R., Naturvidensk. og mathem. 

 Afd. 5. Rd. 1861, pp. 341-432, tab. 1-L5. 



t " Neue Beitrage zur parasitiscber Copepoden," Bull. Soc. Imp. des 

 Naturalistes de Moscou, 18(>4, torn. xxx\-ii. pp. 401-o20, Taf. 5-8. 



I ' Beobacbtimgen iiber Lern<eocera, Penicuhvi und Lerntea, ein Bei- 

 trapr zur Xaturgeschichte der Leruaeeu," Marburg & Leipsig, 4to, pp. 1-32, 

 Taf. 1-4 : 18G8. 



